Qiang Cao;宇新 苗;Guohui Feng;Xiaowei Gao;Bin Liu;Yuqing Liu;Fei Li;Raj Khosla;David J. Mulla;福锁 张
China Agricultural University;Nanjing Agricultural University;China Association for Science and Technology;Qingfeng Farm;Inner Mongolia Agricultural University;Colorado State University;University of Minnesota Twin Cities
发表时间:2017-12
期 刊:Field Crops Research
语 言:English
U R L: http://www.scopus.com/inward/record.url?scp=85032469367&partnerID=8YFLogxK
Nitrogen (N) management needs to be significantly improved to address the triple challenge of global food security, environmental pollution and climate change. In addition to being site-specific, dynamic in-season management is needed to respond to temporal variability in soil N supply and crop N demand. Active canopy sensor-based precision N management (CS-PNM) aims to match N supply with crop N demand in both space and time. Studies that systematically compare this strategy with other N management strategies are limited, especially in intensively farmed regions of developing countries. The objective of this study was to compare CS-PNM strategy in terms of agronomic and environmental impacts in comparison with farmer's N practice, regional optimum N management, modified Green Window-based N Management and soil test-based in-season root zone N management for an intensive winter wheat (Triticum aestivum L.) and summer maize (Zea mays L.) rotation system in North China Plain. A field experiment was conducted from 2008 to 2012 in Quzhou, Hebei Province of China to evaluate these systems. The CS-PNM strategy was consistently better for both crops than the other tested strategies. In comparison with farmer's practice and regional optimum N management, the CS-PNM strategy reduced N fertilizer applications by 62% and 36%, increased N use efficiencies by 68–123% and 20–61%, decreased apparent total N losses by 81% and 57%, and lowered intensities of total N2O emission, greenhouse gas emission and reactive N losses by 54–68% and 20–42%, respectively. Here we demonstrate that relative to current N management strategies, the CS-PNM strategy has significant potential to improve N use efficiencies and mitigate environmental degradation for sustainable intensification of agriculture in developing countries.
农业与生物学
地球与环境科学
Scopus度量
年份 | CiteScore | SJR | SNIP |
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1996 | |||
1997 | |||
1998 | |||
1999 | 0.947 | 1.158 | |
2000 | 0.775 | 1.131 | |
2001 | 0.972 | 1.403 | |
2002 | 0.859 | 1.595 | |
2003 | 0.969 | 1.689 | |
2004 | 0.843 | 1.322 | |
2005 | 0.933 | 1.472 | |
2006 | 1.241 | 1.86 | |
2007 | 1.111 | 1.578 | |
2008 | 1.353 | 1.69 | |
2009 | 1.385 | 1.698 | |
2010 | 1.192 | 1.647 | |
2011 | 4.1 | 1.529 | 1.92 |
2012 | 4.3 | 1.315 | 1.967 |
2013 | 4.6 | 1.378 | 1.822 |
2014 | 5.3 | 1.666 | 1.909 |
2015 | 6 | 1.798 | 1.997 |
2016 | 5.9 | 1.619 | 1.962 |
2017 | 5.8 | 1.474 | 2.028 |
2018 | 6.2 | 1.703 | 1.918 |
2019 | 7.4 | 1.767 | 2.178 |
2020 | 8.8 |
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